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FTTC User Framer

The MC92052 is a peripheral device for the user side of an FTTC drop. It is composed of downstream and upstream TC-sublayer functionality with UTOPIA compliant ATM-layer ports.

MC92052 Features

? Implements the DAVIC short-range baseband asymmetrical physical layer standard

? Supports a bit rate of up to 51.84 Mbit/sec downstream

? Provides TDMA at a bit rate of up to 6.48 Mbit/s upstream, including DAVIC Bit Rates B, C, and D

? Interfaces to an ATM-layer device using a UTOPIA compliant interface

? Performs convolutional deinterleaving of the downstream payload blocks for the full range of interleaving depths (M = 1-31) using an external 16K x 8 SRAM

? Can optionally use an internal RAM for deinterleaving when the interleaving depth is small (M ≤ 2)

? Performs Reed-Solomon encoding of the upstream frames and decoding of the downstream frames

? Performs HEC-based cell delineation and error correction on the downstream data

? Optionally filters received ATM cells based on GFC/VPI pattern matching

? Includes serial data interfaces to a Physical Medium Dependent (PMD) sublayer device

? Optional serial data link interfaces for upstream and downstream frames

? Includes a power level control interface to the transmitter

? Provides an 8-bit system interface as a generic slave device

? IEEE 1149.1 (JTAG) boundary scan test port

? 3.3 V operation with TTL compatibility on I/O pins

? Extended temperature operation: -40 to 85 °C

? Available in 128 Pin Plastic Quad Flat Package